Fix typo in Merge Requests API documentation
Fix typo in Merge Requests API documentation

jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,screenpages/gitlabhq,openwide-java/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,SVArago/gitlabhq,iiet/iiet-git,allysonbarros/gitlabhq,martijnvermaat/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,htve/GitlabForChinese,SVArago/gitlabhq,icedwater/gitlabhq,openwide-java/gitlabhq,dplarson/gitlabhq,shinexiao/gitlabhq,martijnvermaat/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,icedwater/gitlabhq,axilleas/gitlabhq,daiyu/gitlab-zh,t-zuehlsdorff/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,daiyu/gitlab-zh,shinexiao/gitlabhq,allysonbarros/gitlabhq,daiyu/gitlab-zh,shinexiao/gitlabhq,LUMC/gitlabhq,jirutka/gitlabhq,martijnvermaat/gitlabhq,dreampet/gitlab,SVArago/gitlabhq,iiet/iiet-git,mr-dxdy/gitlabhq,dreampet/gitlab,screenpages/gitlabhq,dplarson/gitlabhq,icedwater/gitlabhq,htve/GitlabForChinese,htve/GitlabForChinese,SVArago/gitlabhq,daiyu/gitlab-zh,allysonbarros/gitlabhq,jirutka/gitlabhq,LUMC/gitlabhq,mr-dxdy/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,screenpages/gitlabhq,shinexiao/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,screenpages/gitlabhq,mmkassem/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,mr-dxdy/gitlabhq,allysonbarros/gitlabhq,openwide-java/gitlabhq,t-zuehlsdorff/gitlabhq,iiet/iiet-git,martijnvermaat/gitlabhq,openwide-java/gitlabhq,mmkassem/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,stoplightio/gitlabhq,LUMC/gitlabhq